While international comparisons such as those provided by PISA may be meaningful in terms of overall judgements about the performance of educational systems, caution is needed in terms of more fine-grained judgements. In particular it is argued that the results of PISA to draw conclusions about the quality of instruction in different systems is…

In this study we examined variations of the nonequivalent groups equating design for tests containing both multiple-choice (MC) and constructed-response (CR) items to determine which design was most effective in producing equivalent scores across the two tests to be equated. Using data from a large-scale exam, this study investigated the use of…

Large data sets from a state reading assessment for third and fifth graders were analyzed to examine differential item functioning (DIF), differential distractor functioning (DDF), and differential omission frequency (DOF) between students with particular categories of disabilities (speech/language impairments, learning disabilities, and emotional…

The comparability of examinations in different subjects has been a controversial topic for many years and a number of criticisms have been made of statistical approaches to estimating the "difficulties" of achieving particular grades in different subjects. This paper argues that if comparability is understood in terms of a linking…

Addresses issues faced by institutions attempting to design school profiles to meet accountability standards. Reports of high-stakes test results can be skewed by choice of statistic type (percent of students passing versus mean scores), sample bias, geographical transients, and omission errors. Administrators must look beyond "common…

Although testing accommodations are commonly provided to students with disabilities within large-scale testing programs, research findings on how well accommodations allow for comparable measurement of student knowledge and skill remain inconclusive. The purpose of this study was to examine the extent to which 1 commonly held belief about testing…

Exact nonparametric procedures have been used to identify the level of differential item functioning (DIF) in binary items. This study explored the use of exact DIF procedures with items scored on a Likert scale. The results from an attitude survey suggest that the large-sample Cochran-Mantel-Haenszel (CMH) procedure identifies more items as…

Standard errors and bias of unidimensional and multidimensional ability estimates were compared in a factorial, simulation design with two item response theory (IRT) approaches, two levels of test correlation (0.42 and 0.63), two sample sizes (500 and 1,000), and a hierarchical test content structure. Bias and standard errors of subtest scores…

A critical analysis is presented of the literature as it relates to survey research, including personal interviews, telephone interviews, and mail questionnaires. Additional research concerns are explored, and a code of ethics for survey researchers is presented. Focus groups, interviews, long interviews, telephone interviews, and mail surveys are…

This paper discusses whether or not revisions of the Scholastic Aptitude Test (SAT) and the American College Test (ACT) have created such significant differences between the two tests that a student could conceivably score significantly higher on one than the other. The SAT has been revised to meet the needs of an increasingly diverse student…